Out of the following main sequence stars which one has the coolest surface temperature.
O-type
B-type
G-type
K-type
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Stars of which colour have the coolest surface temperature?
Two stars in the constellation Orion. Betelgeuse appears to glow red, whereas Rigel looks blue in color. Which star has a higher surface temperature? (a) Betelgeuse (b) Rigel (c) both the same (d) impossible to determine.
Using Wien's Displacement Law, calculate the peak wavelength given off from the following objects. Classify the type of light that corresponds to this peak wavelength for each object (including color for visible light).
a. An O-type star (T=33000 K)
b. The Sun (T = 5800 K)